Stepchart creation failed!

invalid SM file: measure with a strange number of notes (55 notes at line 847), notes are: array(55) { [0]=> string(4) "MMMM" [1]=> string(4) "MMMM" [2]=> string(4) "MMMM" [3]=> string(4) "MMMM" [4]=> string(4) "MMMM" [5]=> string(4) "MMMM" [6]=> string(4) "MMMM" [7]=> string(4) "MMMM" [8]=> string(4) "MMMM" [9]=> string(4) "MMMM" [10]=> string(4) "MMMM" [11]=> string(4) "MMMM" [12]=> string(4) "MMMM" [13]=> string(4) "MMMM" [14]=> string(4) "MMMM" [15]=> string(4) "MMMM" [16]=> string(4) "MMMM" [17]=> string(4) "MMMM" [18]=> string(4) "MMMM" [19]=> string(4) "MMMM" [20]=> string(4) "MMMM" [21]=> string(4) "MMMM" [22]=> string(4) "MMMM" [23]=> string(4) "MMMM" [24]=> string(4) "MMMM" [25]=> string(4) "MMMM" [26]=> string(4) "MMMM" [27]=> string(4) "MMMM" [28]=> string(4) "MMMM" [29]=> string(4) "MMMM" [30]=> string(4) "MMMM" [31]=> string(4) "MMMM" [32]=> string(4) "MMMM" [33]=> string(4) "MMMM" [34]=> string(4) "MMMM" [35]=> string(4) "MMMM" [36]=> string(4) "MMMM" [37]=> string(4) "MMMM" [38]=> string(4) "MMMM" [39]=> string(4) "MMMM" [40]=> string(4) "MMMM" [41]=> string(4) "MMMM" [42]=> string(4) "MMMM" [43]=> string(4) "MMMM" [44]=> string(4) "MMMM" [45]=> string(4) "MMMM" [46]=> string(4) "MMMM" [47]=> string(4) "MMMM" [48]=> string(4) "MMMM" [49]=> string(4) "MMMM" [50]=> string(4) "MMMM" [51]=> string(4) "MMMM" [52]=> string(4) "MMMM" [53]=> string(4) "MMMM" [54]=> string(4) "MMMM" }